CVE-2019-15430 in D3 Pro
Summary
by MITRE
The Bluboo D3 Pro Android device with a build fingerprint of BLUBOO/Bluboo_D2_Pro/Bluboo_D2_Pro:7.0/NRD90M/1510370501:user/release-keys contains a pre-installed app with a package name of com.qiku.cleaner app (versionCode=2, versionName=2.0.0_VER_32516508295515) that allows other pre-installed apps to perform system properties modification via an accessible app component. This capability can be accessed by any pre-installed app on the device which can obtain signatureOrSystem permissions that are required by other other pre-installed apps that exported their capabilities to other pre-installed app.
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Analysis
by VulDB Data Team • 02/20/2024
The vulnerability identified as CVE-2019-15430 represents a critical security flaw in the Bluboo D3 Pro Android device that stems from improper access control mechanisms within pre-installed applications. This issue specifically affects devices running Android 7.0 with build fingerprint BLUBOO/Bluboo_D2_Pro/Bluboo_D2_Pro:7.0/NRD90M/1510370501:user/release-keys and involves a pre-installed application named com.qiku.cleaner with version 2.0.0_VER_32516508295515. The vulnerability resides in the application's component design that exposes system modification capabilities to other pre-installed applications without proper authorization checks.
The technical flaw manifests through the improper exposure of system properties modification capabilities within the pre-installed cleaning application. This application acts as a system component that allows other pre-installed applications to modify system properties, effectively creating a privilege escalation vector. The vulnerability occurs because the com.qiku.cleaner application exports its capabilities to other pre-installed applications, and any pre-installed app that can obtain signatureOrSystem permissions can access these exported functionalities. This design flaw violates fundamental Android security principles and creates an attack surface that can be exploited by malicious applications within the same privileged group.
The operational impact of this vulnerability is significant as it allows for unauthorized system modifications that could compromise device integrity and user privacy. Attackers with access to pre-installed applications that can obtain signatureOrSystem permissions can leverage this vulnerability to modify system properties, potentially altering device behavior, disabling security features, or gaining elevated privileges. The vulnerability affects the entire pre-installed application ecosystem on the device, creating a chain reaction where any compromised pre-installed application could exploit this weakness to modify system configurations. This represents a serious threat to device security and could enable persistent backdoors or privilege escalation attacks that are difficult to detect and remediate.
The vulnerability aligns with CWE-276, which describes improper privilege management, and can be categorized under ATT&CK technique T1546.001 for modifications to the Windows Registry or system properties. The flaw demonstrates a failure in Android's security model where pre-installed applications are granted excessive permissions without proper sandboxing or access control enforcement. Organizations and users should consider this vulnerability as part of a broader class of insecure component vulnerabilities that affect mobile device security. The exposure of system modification capabilities to other pre-installed applications violates the principle of least privilege and creates a dangerous situation where legitimate system components can be exploited by malicious applications within the same permission group.
Mitigation strategies should focus on immediate application updates and security policy enforcement. Device manufacturers should implement proper access control mechanisms that prevent pre-installed applications from exposing system modification capabilities to other applications without explicit authorization. The vulnerability can be addressed through application-level fixes that properly restrict component exports and implement stricter permission checking. Users should be advised to avoid installing untrusted applications and to maintain current security patches. Additionally, security monitoring should be implemented to detect unauthorized system modifications, and organizations should consider device hardening measures that restrict pre-installed application capabilities to prevent privilege escalation attacks. The vulnerability serves as a reminder of the importance of secure coding practices and proper security architecture design in mobile operating systems.